| (19) |
 |
|
(11) |
EP 0 187 169 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
28.01.1987 Bulletin 1987/05 |
| (43) |
Date of publication A2: |
|
16.07.1986 Bulletin 1986/29 |
| (22) |
Date of filing: 27.12.1984 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
27.12.1983 JP 24895583
|
| (71) |
Applicant: HITACHI METALS, LTD. |
|
() |
|
| (72) |
Inventors: |
|
- Endo, Juro
()
- Murakami, Shiro
()
- Fujii, Shigeo
()
- Nakao, Masayuki
()
- Iimura, Tsutomu
()
|
|
| |
|
| (54) |
Process of manufacturing magnetic recording media and the media |
(57) A process of manufacturing Co-Ni magnetic recording media by sputtering Co-Ni thin
film layer on a substrate in Argon atmosphere including nitrogen and heating the thin
film to evaporate nitrogen from the thin film to prepare the magnetic recording media
appropriate for high density longitudinal recording, wherein on sputtering the substrate
is maintained at a temperature of room temperature to 300°C.